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Rosewill SMG Series, SMG850, 850W Fully Modular Power Supply, 80 PLUS GOLD Certified, Low Noise Fluid Dynamic Bearing Fan with Auto Speed Control, Japanese Capacitors, Black

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In stock. Limit 5 per customer.
Ships from United States.
  • 850W
  • 550W
  • 1 x 135 mm
  • 1 x 120 mm
  • CMG Series
  • PMG Series
  • SMG Series
  • 80 Plus Gold Certified: Delivers 90% or more efficiency under typical load conditions and provides numerous defenses for your sensitive equipment, including protection from short-circuit, over-current, over-voltage, over-power, under-voltage, and over-temperature.
  • Function First: Built for high performance with 100% Japanese capacitors to ensure top-notch operations for your system. Reduce dust build-up and achieve better cable management with this fully modular power supply using only the cables your build requires.
  • Superior Silence: The 135mm fan provides the PSU with optimal airflow with lower sound. Enjoy your content without extra noise pollution.
  • 5-Year Warranty: Dependability is paramount, and if anything does go wrong, your 850w PSU is protected.
Rosewill Power Supply

Power Supplies

Rosewill's line of Power Supplies offer a wide range of options for building or improving your gaming PC rig.

Rosewill Power Supply

SMG850 850 Watt Power Supply

Fully Modular Design

A fully modular power supply design allows for customized cable arrangement, plus reduced clutter and better airflow compared to a non modular or semi modular power supply within your computer case or system.

80 Plus Gold Certified

Delivers 90% or more efficiency under typical load conditions. Prevents the waste of power and unnecessary additional heat.

ATX Combatibility

ATX 12V V2.3 ready, Crossfire ready, and SLI ready. Power Supply is also backward-compatible with ATX 12V 2.01


  • Active Power Factor Correction
  • Over Voltage Protection
  • Over Current Protection
  • Short Circuit Protection
  • Over Power Protection
  • Over Temperature Protection
  • MTBF > 1000,000 at 80% load
Sony Portable Speakers

Quiet 135mm Fan

Designed to produce low noise while expanding your the lifespan of your power supply.

Sony Portable Speakers

100% Japanese Capacitors

Japanese Capacitors provide reliability and a longer lifespan to your power supply.

Sony Portable Speakers

Safety Protections

Active Power Factor Correction, Over Voltage, Over Current, Short Circuit, Over Power, and Over Temperature Protection.

Sony Portable Speakers
Sony Portable Speakers
Sony Portable Speakers
This Item
Sony Portable Speakers
Sony Portable Speakers
20+4 Motherboard PIN Connector 1 1 1 1 1
4+4 CPU PIN Connector 1 2 2 2 2
6+2 PIN PCI-E Connector 4 4 6 8 8
SATA Connector 8 8 12 16 16
4 PIN Molex Connector 4 4 4 4 4
4 PIN Floppy Connector 1 1 1 1 1
Fan Bearing Type Sleeve Bearing Sleeve Bearing 2-Ball Bearing Fluid Dynamic Bearing Fluid Dynamic Bearing
Sony Portable Speakers

About Rosewill

Rosewill Inc. was established in 2004, as a go-to resource for PC components and accessories. Over time, it has expanded its product line to include consumer electronics, home appliances, and more. For nearly two decades, Rosewill has remained dedicated to providing its customers with high-quality, reliable products to help accomplish everyday tasks.

Warranty & Returns

Warranty, Returns, And Additional Information


  • Limited Warranty period (parts): 5 years
  • Limited Warranty period (labor): 5 years
  • Read full details

Return Policies